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Disabling Kerberos encryption method RC4_HMAC_MD5 causes QlikView Server to disconnect

Sonja_Bauernfeind
Digital Support
Digital Support

Disabling Kerberos encryption method RC4_HMAC_MD5 causes QlikView Server to disconnect

Issue:

A Windows Group Policy might disable the use of the RC4_HMAC_MD5 encryption method.

In effect, the QlikView Server will show as disconnected in the Management console. Publishing / Distributing files to it will fail. And any attempt to open documents using qvp:\servername will also disconnect. 

Review the local machines Local Security Policy. 

  1. Open the Local Security Policy Panel
  2. Switch to Security Options
  3. Locate: Network security: Configure encryption types allowed for Kerberos 
  4. Is it disabled? See Fig 1.

Fig 1Fig 1



Resolution:

During the disabling of this method, an additional configuration step is required by Microsoft

Next, the AES 128 bit encryption needs to be enabled on

  • the Service Account running QlikView
  • the Service Account(s) running the NPrinting Server/Engine(s) - if NPrinting Server is in use.

NOTE: The NPrinting Service Account user must be different that the QlikView Service Account. See Dedicated NPrinting Server & Engine Service Account

accounts upports kerberos aes 128.png

NOTE:

Related Investigation ID: QV-22276

 

Version history
Revision #:
8 of 8
Last update:
Tuesday
Updated by: